145523051 has 4 divisors (see below), whose sum is σ = 148907352. Its totient is φ = 142138752.

The previous prime is 145523041. The next prime is 145523069. The reversal of 145523051 is 150325541.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 150325541 = 31 ⋅4849211.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-145523051 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 145523051.

It is not an unprimeable number, because it can be changed into a prime (145523011) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1692086 + ... + 1692171.

It is an arithmetic number, because the mean of its divisors is an integer number (37226838).

Almost surely, 2^145523051 is an apocalyptic number.

145523051 is a deficient number, since it is larger than the sum of its proper divisors (3384301).

145523051 is an equidigital number, since it uses as much as digits as its factorization.

145523051 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3384300.

The product of its (nonzero) digits is 3000, while the sum is 26.

The square root of 145523051 is about 12063.2935386651. The cubic root of 145523051 is about 525.9897290616.

Adding to 145523051 its reverse (150325541), we get a palindrome (295848592).

The spelling of 145523051 in words is "one hundred forty-five million, five hundred twenty-three thousand, fifty-one".